Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f1142b2f64c6f0…

MALICIOUS

PDF

90.2 KB Created: 2021-07-17 03:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 22801f802698ef3b91012a14bcfa7fd5 SHA-1: 5c343e896d4604fc35851667989ce59df2f69f35 SHA-256: b9f1142b2f64c6f0de1ed6a7ca34a5f46a218245fa7ecc0ac1c7662bb2fde378
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to disposable domains or compromised WordPress sites, indicating a link farm used for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the structure and URL patterns are indicative of a malicious PDF designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://relans-nn.ru/images/docs/file/direzonidetuzovener.pdf In PDF document text
    • http://traiteur-ribot.fr/userfiles/file/zituwelitovogano.pdfIn PDF document text
    • http://zzweien.com/d/files/kavagaku.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/1680402283.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/22060553676.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/a1ee614ac0263471dad12c22bb858939/jipuvajiw.pdfIn PDF document text
    • http://jump360.co/upload/files/20210624212915.pdfIn PDF document text
    • http://beiks.info/public/file/zodutozisuxoxijugorut.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/29263846800.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859cad4baaf.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/74bbb61a55c7475cba0cdab786cb93ae/66483600772.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/93367644a6e418cce59ec3e264edea57/26026829313.pdfIn PDF document text
    • https://ksuskalology.com/images/file/wakoduvawolesavulo.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/ffrq2np82embr93tn578d1b5v4/bopivolobinalo.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb085ba6e81---49357541481.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/fuduserevorepawu.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b2a25886b---sidawusexoj.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/19f785ec052dfce61af778177bd890fd/39377964544.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609029c16c0cb---46372226258.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/tivixosusopotu.pdfIn PDF document text
    • http://axwelindia.com/uploads/92577719448.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/zadut.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/6b8422899db757b8d0ac1331e31f55b0/52817700149.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/89140033014.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+long+can+raw+chicken+sit+out+at+room+tempPDF link annotation
    • http://janyska.home.pl/_mjanyska2013/fotki/file/25433394769.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA7 11092 bytes
SHA-256: 580b9343012d9adcdaf2e2e9e1f2a2754a446e1d7e8216e999bccbed598e7a34
font_02_sfnt_off0001285d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285D 20156 bytes
SHA-256: 0fa7f58cf669baf8f015e51809c0e337abcf9c2750e5e3d1e0e31036ca211cb4

Open this report in the interactive analyzer, or submit your own file for analysis.